Citation: Yuan Wang, Peng Yi Zhang, Gang Pan, Hao Chen. Photochemical degradation of environmentally persistent perfluorooctanoic acid (PFOA) in the presence of Fe(III)[J]. Chinese Chemical Letters, ;2008, 19(3): 371-374. doi: 10.1016/j.cclet.2007.11.007 shu

Photochemical degradation of environmentally persistent perfluorooctanoic acid (PFOA) in the presence of Fe(III)

Yuan Wang ^a,b,c, ,
Peng Yi Zhang ^c ,
Gang Pan ^a ,
Hao Chen ^a

a State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing 100085, China;
b Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;
c Department of Environment Science and Engineering, Tsinghua University, Beijing 100084, China

Received Date: 28 August 2007

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 20577026) and National Basic Research Program of China (No. 2007CB613303).

Environmentally persistent and bioaccumulative perfluorooctanic acid (PFOA) was difficult to be decomposed under the irradiation of 254 nm UV light. However, in the presence of 80 μmol/L Fe (III), 80%of PFOAwith initial concentration of 48 μmol/L (20 mg/L) was effectively degraded and 47.8% of fluorine atoms in PFOA molecule were transformed into inorganic fluoride ion after 4 h reaction. Shorter chain perfluorocarboxylic acids bearing C₃-C₇ and fluoride ion were detected and identified by LC/MS and IC as the degradation products in the aqueous solution. It was proposed that complexes of PFOA with Fe (III) initiated degradation of PFOA irradiated with 254 nm UV light.
- Perfluorooctanoic acid,
- Iron(III),
- Photochemical degradation,
- 254 nm UV light
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